ARIANNA GIMIAN CASSIDY MD
NPI 1902268923
Obstetrics & Gynecology in San Francisco, CA
About Arianna Gimian Cassidy Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ARIANNA GIMIAN CASSIDY MD (NPI 1902268923) is an individual obstetrics & gynecology provider in San Francisco, California, licensed in California (152059) and active in the NPI registry since March 2016. She is enrolled in Medicare PECOS, maintains a secondary practice location in Los Altos, and is a graduate of University Of California, San Francisco School Of Medicine (2016).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Other Identifiers 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Arianna Gimian Cassidy Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
5Medicare enrollment records show Arianna Cassidy reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
San Francisco, CA 94110
- Reassigned Medicare billing, California enrollment
- 1,573 clinicians in this Medicare group
San Francisco, CA 94110
- Reassigned Medicare billing, California enrollment
- 842 clinicians in this Medicare group
San Francisco, CA 94143
- Reassigned Medicare billing, California enrollment
- 5,645 clinicians in this Medicare group
San Francisco, CA 94122
- Reassigned Medicare billing, California enrollment
- 5,544 clinicians in this Medicare group
Alameda, CA 94501
- Reassigned Medicare billing, California enrollment
- 900 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 94110 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SAN FRANCISCO, CA 94110
SAN FRANCISCO, CA 94110
SAN FRANCISCO, CA 94110
SAN FRANCISCO, CA 94110
SAN FRANCISCO, CA 94110
SAN FRANCISCO, CA 94110
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Arianna Cassidy's NPI number?
The NPI number for Arianna Cassidy is 1902268923. It was assigned to this individual provider in the NPPES registry on March 28, 2016.
Where is Arianna Cassidy located?
Arianna Cassidy practices at 1001 Potrero Ave # 6D Sfgh Ob Gyn, San Francisco, CA 94110. The listed phone number is (415) 206-4069.
What is Arianna Cassidy's specialty?
The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.
Is Arianna Cassidy enrolled in Medicare?
Yes. Arianna Cassidy is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Arianna Cassidy's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Arianna Cassidy reassigns Medicare benefits to 5 organizations: City & County Of San Francisco (San Francisco, CA), University Of California Sfgh Medical Group (San Francisco, CA), University Of California San Francisco (San Francisco, CA), Ucsf Medical Group Business Services (San Francisco, CA) and Alameda Health System (Alameda, CA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Arianna Cassidy's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Arianna Cassidy was last updated on September 8, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Arianna Gimian Cassidy, MD · NPI 1902268923
Obstetrics & Gynecology physician in San Francisco, California. Individual provider, active in the CMS NPPES registry since March 28, 2016.
## Identity
- **NPI:** 1902268923 (Entity type: Individual)
- **Enumerated:** March 28, 2016
- **Primary specialty:** Obstetrics & Gynecology · taxonomy 207V00000X
- **State license:** 152059 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 1001 POTRERO AVE # 6D, SFGH OB GYN, San Francisco, CA 94110-3518
- **Phone:** (415) 206-4069
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 5 organizations under Medicare reassignment (form CMS-855R): City & County Of San Francisco (NPI 1083648810, San Francisco, CA); University Of California Sfgh Medical Group (NPI 1174598296, San Francisco, CA); University Of California San Francisco (NPI 1346329380, San Francisco, CA); Ucsf Medical Group Business Services (NPI 1477624104, San Francisco, CA); Alameda Health System (NPI 1124446158, Alameda, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of California, San Francisco School Of Medicine, class of 2016
## Record status
- **NPPES last updated:** September 8, 2023
- **Other identifiers:** Other A152059 (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1902268923) · Data from the CMS NPPES public registry.